Composite Si-PIN 14 MeV neutron detector

This paper presents the principle of a new composite (C_2H_4)_n-PIN sandwiched fusion neutron detector, which uses 2?mm (C_2H_4)_n as sensitivity enhancement medium, and add circuit to merge the output signals. The main merits of the detector are: (1) greatly improved neutron sensitivity and better statistics; (2) improved n/γ discrimination; (3) implementing the signal summation without obviously affecting the time response. Characteristics of the detector, including the sensitivity to 14?MeV neutron and 1.25?MeV γ ray, n/γ discrimination, time response, and statistics are studied theoretically and experimentally.